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Патент USA US3070013

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Dec, 25, 1962
T. F. STACY
3,070,003
AUTOMATIC CAGE TYPE PRESS
Filed May 16, 1960
77
3 Sheets-Sheet 1
70
2/ 79
77
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150%
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INVENTOR
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ATTORNEYS
Dec. 25, 1962
T. F. STACY
3,070,003
AUTOMATIC CAGE TYPE PRESS
Filed May 16, 1960
3 Sheets-Sheet 2
36p.
7 .
INVENTOR
BY @yw
ATTORNEYS
ice
1
3,070,003
AUTOMATIC CAGE TYPE PRESS
Thomas F. Stacy, Pique, @hio, assignor to The French Gil
Mill Machinery Company, Piqna, Ghio
.Filed May in, 1960, Ser. No. 29,264
14 Claims. (Cl. 100-51)
13,07,603
Patented Dec. 25, 1962
2
being driven by an electric motor 27 and the pump 26 by
an electric motor 23. Flow of the hydraulic ?uid from
the pump 26 is controlled by a 3 position-4 connection
spring centered solenoid operated valve Bil in the pressure
outlet conduit 31, this conduit having a connection to a
pressure relief valve 31'. As is clearly shown in FIG. 6
the valve St} has a solenoid F at its left end and a sole
This invention relates to presses of the type generally
used in the extracting of oils or other liquids from vege
noid G at its right end.
table or other matter. More particularly the invention re
lates to hydraulic cage type presses, and one of the ob
an outlet port A controlled by a solenoid A’ and an outlet
port B controlled by a solenoid B’. A conduit 32 from
jects of this invention is to provide a press of this type
port A leads to a 3 position, 4 connection, closed center,
which is automatic in operation and capable of running
spring centered, solenoid operated valve 33. A solenoid
continuously without human supervision.
The variable displacement pump 25 is provided with
D controls movement toward the left side of the valve
A further object is to provide a press which automat 15 33 while a solenoid E controls movement toward the right
ically discharges the cake or residue after the liquid has
side. This conduit 32 also goes to a shut-off valve 34 actu
been expressed by the press.
ated by the plunger 12 through cam and roller actuation
In the drawings which illustrate by way of example one
l3 and to a check valve 35, both the shut-off valve 34
embodiment of this invention:
and check valve 35 connect to the back area of the
FIG. 1 is a sectional elevation of a press embodying 20 plunger 12 by a conduit 36.
this invention showing the same in idling or ?lling posi
A conduit 38 from port B of pump 25 connects to a
tion.
shut-off valve 39 which is controlled by a solenoid C’,
FIG. 2 is a similar view thereof showing the press
and then connects by conduit 39’ to the valve 3%, a pres
closed and the material under ?nal pressure.
sure gage 4Q, pressure switch 41 and the head of cylin
FIG. 3 is a similar view thereof showing the plunger 25 der 10.
slightly retracted and the cake freed.
A conduit 43 connects the valve 33 to the head of pis
FIG. 4 is a similar view thereof showing the cage of
tons 24B of the cage cylinders 19 while a conduit 44 con
the press retracted and the cake dropping from the press.
nects to the cylinders 19‘ to act on the other ends of the
FIG. 5 is a similar view thereof showing the parts re
pistons 26 and also connects to the shutoff valve 46. This
turned to the position shown in FIG. 1 with the cage 30 valve also connects to the aforementioned conduit 36 and
moved forward, the plunger in retracted position and the
cylinder iii and is mechanically operated by a cam and
press being re?lled by gravity feed and in position to re
roller actuator 48.
start the cycle.
In FIG. 7 illustrated diagrammatically is the electrical
PEG. 6 is a diagrammatic showing of the hydraulic sys
circuitry which governs the automatic sequence of actions
tem and the necessary hydraulic components used to 35 that the hydraulic controls will take to ‘make the press
control the automatic press.
operate automatically after it is set into operation.
FIG. 7 is a diagrammatic showing of the electrical sys
In FIGS. 6 and 7 symbols are employed which are
tem used with the hydraulic components.
commonly used in hydraulics and which will readily be
As shown in FIGS. 1 through 5 my improvements are
understood by persons skilled in that art. There is also
shown as applied to a horizontal hydraulic press 15%;" 40 employed in connection with these symbols an intermit
which comprises a hydraulic cylinder it} which encloses
tently rotating circuit closing and opening device which
the piston ll of a hydraulic ram or plunger 12. The
is not shown to avoid unnecessary complication and con
plunger 12 is received into a cylindrical bore 14 of a cage
fusion of the drawings and for the further reason that
15 having its other end closed by a dowel end portion 17
such rotary devices are well known in the art.
of the cage head or closure 13. The cage closure is pro
Current is supplied to the leads St} and 51 in FIG. 7
to actuate the various electrical components. As shown
vided
and piston
with rods
hydraulic
21. These
cylinders
piston19rods
containing
21 at thepistons
ends op
when the “hand-automatic” switch S5 is moved to hand
posite their pistons are fastened to the cage 15 and serve
operation, the line 5% will be connected to the line 52
to reciprocate the cage to the left or right as is required.
through the lower pair of contacts of switch 55. For
The cage 15 also has a hopper or equivalent receptacle
automatic operation the switch is moved into position
to guide the material M into the cage cylinder 14.
shown in FIG. 7. When the start button 56 is depressed
In FIGS. 1 and 5 with the parts in the positions shown,
manually, the starter coil 57 of the motor 27 of pump 25
material drops from the hopper 16 into the cage cylinder
is energized and the pump builds‘up pressure. it stop
14 to whatever volume gravity and bulk permits—this con
button 58 is depressed, coil 57 is deenergized and the
stituting a charge to be pressed.
55 motor will stop. Similarly the starter 61 of the motor 28
After a proper interval of time for the ?lling, the
of pump 26 may be energized by depressing start button
plunger 12 and piston 11 are moved to the right to com
60 or stopped by depressing stop button 62.
press the material M in the cylinder 14 of the cage 15
If compressing movement of the plunger 12 is desired
whereupon the plunger arrives at the position shown in
the push button switch 65 is depressed and pump solenoid
FIG. 2. After an interval of time the piston and plunger 60 B’ is energized permitting ?uid to flow from pump 25,
12 retract slightly to the left to free the cake C, FIG. 3.
port 13 through shut-off valve 39 into the cylinder iii
Shortly thereafter the cage pistons 28 and rods 21 are
pressing piston 11 to the right or compressing position.
activated to move the cage 15 to the left and thereby strip
To move the main plunger 12- in the reverse position,
the cake C free of the cylinder 14- whereupon it falls
button 66 is depressed completing the circuit to solenoid
away free of the press. After another time interval the
A’ of pump 25 permitting ?uid to flow from the A port
plunger 12 is returned to the left and the cage 15 is re
of pump 25. Mechanically connected to button 66 is a
turned to the right returning the parts to the positions
switch button 67 which closes at the same time energizing
shown in FIGS. 1 and 5 and ready for another cycle after
solenoid E which lets fluid flow from port A of pump 25
time is provided for ?lling the cage.
to conduit 32, valve 33, conduit 44, valve 445 and conduit
T 0 make possible the above operation, hydraulic power 70 36 into the pull back area of piston 11 and cylinder ill,
is derived from a single variable displacement pump 25
thus returning plunger 12 to the left.
and a double ?xed displacement pump 26, the pump 25
To move the cage 15 to the left to drop the cake C,
3,070,003
A.
piston
11.
Cam
switch
d4
is
thus closed, energizing the
button 68 is depressed thereby completing a circuit
rotary solenoid 89 through step switch contacts 95. This
through solenoid A’ of pump 25 and also through me
advances the step switch to its third position.
chanically connected switch 69, and line 52 to the sole
Step switch contacts 96 are then closed to energize
noid D and the other side of the line 51, thus energizing
solenoid D of valve 33, shifting the valve so that conduit $1 the solenoid C’ of the shut-off valve 39 thus blocking pres
sure liquid from the head of the plunger piston 11 from
32 of port A is connected to conduit 4-3, thereby pushing
port B of pump 25 through the conduits 32’ and 38.
pistons 24? and cage
to the left. At the same time that
Step switch contacts 92 now open ‘and solenoid G is de
switch as is depressed, another mechanically connected
energized returning valve 39 to center position thus
switch 71% closes and the line 52 is connected to the sole
3
noid C’ and line 51 thus energizing solenoid C’ to close 10 blocking the main area of main cylinder 16 from tank and
stopping the plunger 12 in the position shown in FIG. 3.
valve
To reverse
39 stopping
and push
?owcage
of liquid
15 to from
the right, button
cylinder"71 is
Step switch contacts 98 now close to energize the solenoid
D of valve 33 which permits oil from the port A of pump
depressed thus energizing solenoid A’ and mechanically
25 to ?ow through the conduit 32‘ to the conduit 43 and
closing the switch 72 so that current fiows from line 5'2
the main area of the cage cylinder 19 moving the piston
into solenoid E to line 51. This energizes solenoid E
29 and cage 15 to the left, strip-ping the cake C out of the
shifting valve 33 to connect conduit 32 to conduit dd and
cage 15 ‘as shown in FIG. 4. The cage moves to the left
thus permitting ?uid to push pistons 29 and cage 15
and actuates limit switch 99, which energizes the rotary
to the right. At the same time switch 73, which is also
solenoid 8? through step switch contacts 100- which ad
mechanically connected to push button 71 connects line
vances the rotary switch into its fourth position.
52 to the solenoid C’ of shutoff valve 39 stopping the Solenoid E of valve 33 is then energized through step
flow of liquid out of the main cylinder 16.
switch contacts 101 closing, as the step switch contacts
Automatic Operation
98 vopen to deenergize solenoid D. This shifts the valve
IL.
Let us assume that the press is open, as shown in P16.
1, and loaded with material and the pump motors 27
and 28 are running. The operator moves switch 55 to
the automatic position shown in FIG. 7. The start but
ton 75 is actuated manually to close the stop switch '76
thus supplying current from line 50‘ to the bus bar 53.
The movable circuit controller, herein referred to but
not shown, will then be in its No. 1 position, in which
contacts se and 81 will be closed. Solenoid B’ will then
be energized through closed contacts 8% as will be sole
noid F of valve 31) through closed contacts 81. Solenoid
B’ shifts the pump 25 to full discharge volume through
its port B to conduit 38 through shut-off valve 3% and
conduit 39 to the main cylinder 1%. Solenoid F moves
the valve 3% to connect the discharge conduits 31 of pump
26 to the conduit 39’, combining with flow from pump 25
33 to permit the pump 25 to supply oil from port A to
conduits 32 and 44 to the push back area of the cage
cylinders and returning the cage 15 back to the right
hand open position. At this position the cam roller ac
tuator 48 of the valve 46 holds the valve 46 in the posi
tion shown in FIG. 6 and admits pressure ?uid to the pull
back area of main cylinder 10 from the pump 25, con
duit 32, valve 33, conduit 44, valve 46 and conduit 36.
Solenoid G, of valve 30, is energized at the same time
that limit switch 29 is actuated. This causes plunger 12
to move to the left until limit switch 102 is actuated
whereupon rotary solenoid switch 89 is energized through
switch 103. This advances the step switch to the ?fth
position and step switch contacts 1115 close to energize the
timer winding of timer 107. Holding contacts 1118 of
timer 107 then close to hold in the timer 107. Timer
whereupon plunger 12 moves to the right compressing the 110 contacts 110 then close to energize a control valve or
material M in the cage 15. Fluid from the material
drains through the screen bars (not shown) of the cage
to the drainage system that is provided as is the usual
practice. The plunger continues to move at high speed
scale 125 if such is used to control the amount of ma
terial fed to the press. However the apparatus may oper
ate without such valve or scale. Plunger 12 continues
to move to the left to the end of its stroke where limit
until pressure builds up to a predetermined setting c-on- L
switch 112 is closed by it.
trolled by pressure switch 41 which closes the circuit to
timer coil 85, closing contacts 36 to run timer motor 8%.
Contact 82, timer 85 opens to break circuit to solenoid F
thus returning valve 313‘ to center position causing pump
26 to discharge at low pressure back to a tank and also
to block main plunger area from tank. This discon
nects the pump 26 from the main area of the plunger
piston 11 and the plunger 12 continues to advance at
slow speed and high pressure supplied from port B of
pump 25. The plunger will continue to advance at the
When the timer 107 times out contacts 88 close to
energize the rotary solenoid 89 through switch 121 which
advances step switch to the sixth position and through the
step switch contacts 118 and the line 119 it advances on
to its ?rst position which star-ts the cycle automatically
over again, without the operator actuating the cycle start
button 75.
Anytime during the automatic cycle the reset button
v120 may be operated to return the step switch to its First
position by energizing rotary solenoid through switch
122. The “Hand Automatic” switch 55 is then turned to
the hand position and the main plunger 12 and cage 15
are returned to their retracted positions. This readies the
reached, and if this occurs the plunger will stop and
press for automatic operation by moving switch 55 to
pressure will be maintained on the material as shown in
FIG. 2 until timer 35 times out. Contacts 114 of timer 60 automatic position and then pushing the start button 75.
At any time it is desired or necessary to stop the cycle
85 then close to energize a rotary solenoid 89. This
the stop button 76 may be operated to stop the press.
advances step switch of rotary solenoid 89 to its second
Upon resumption of the cycle by pressing the start button
position, whereupon step switch contacts 21 are closed
75 the cycle starts where it left off when it was stopped.
to energize pump solenoid A’ and step switch contacts 8t}
Signal light 126 when illuminated indicates the press
open to deencrgize solenoid B’. Solenoid A’ being now
is in action cycling and signal light 127 indicates the
energized discharges high pressure from port A through
main plunger 12 is in closed or pressing position.
conduit 32, shutoff valve 34 and conduit 36 to the pull
high pressure low volume until the predetermined pres
sure setting of the pump pressure compensator 49 is
back area of cylinder 11}. This moves plunger back to
left. Also step switch contacts 92 close to energize sole~
noid G of valve 311 thus connecting the main area of the
cylinder through conduit 39 to tank, thus releasing this
?uid. The plunger 12 retracts approximately one inch.
This distance is controlled by the adjustable cam roller
actuator 13 of the valve 34, this blocking the supply of
oil from port A of pump 25 to the pull back area of the
The cams 13 and 48 are shown diagrammatically in
FIG. 6 as mounted directly on the plungers 12 and 21,
but it will be understood that they are actually not so
mounted but are mounted on different parts connected
with these plungers and move in synchronism with the
plungers.
The rotary switch member or controller operated by
the solenoid 89 preferably is of a type which is well
3,070,003
5
known and which can readily be purchased on the open
market and is therefore not shown. Also the various
solenoid controlled valves employed in connection with
this invention are all available on the open market and
it is therefore not deemed necessary to illustrate them in
detail.
‘
It will be understood that various changes in the details,
materials and arrangements of parts, which have been
6
retraction of said piston su?icient for its free end to
separate from said pressed material and to hold the piston
positively and temporarily in said partially retracted posi
tion, means for then moving said cage along said partially
retracted piston away from said press head until it fully
uncovers said pressed material which is then free to drop
by gravity, means for then causing a return of said cage
on said piston into contact with said head, and means for
herein described and illustrated in order to explain the
causing a full retraction of said piston to uncover said
nature of the invention, may be made by those skilled in 10 cage port for introduction of a new charge of said ma—
the art, within the principle and scope of the invention, as
terial to be pressed through said port into said cage.
expressed in the appended claims.
4. A cage press of the type such as is employed in the
I claim:
pressure extraction of liquids from vegetable and other
1. A cage press having a movable plunger cooperating
materials, which comprises a press cylinder and a press
with a movable cylinder cage, said cage having an open 15 head ?xed apart a selected distance, a piston reciprocable
ing in the side thereof through which material to be
in said cylinder endwise toward and from said head and
pressed is admitted when said plunger and cage are in
extending from said cylinder nearly to said head when it
material-receiving position, electrical switch means ac
is moved toward said head, an extraction cage having a
tuated when a charge of material has been admitted .to
bore open at opposite ends, sliding lengthwise along and
said cage, a valve actuated by said switch means to admit 20 ?tting the outer end of said piston, with the piston enter~
liquid to said press to advance the plunger, a pressure
ing one of said open ends, and with the opposite open end
control valve responsive to the pressure of liquid in the
closed by said head when the cage abuts it, said cage hav~
press, a timer, means actuated by said last mentioned
ing at its end portion nearest said cylinder, a laterally
valve for interrupting the supply of liquid to said press
opening port through which a charge of said material to
and for actuating said timer, means actuated by said
be pressed may be introduced into said bore of said cage in
timer for etfecting a positive partial return movement only
of said plunger, holding the plunger in that position,
and thereafter for advancing said cage to extend around
advance of said piston when said piston is fully retracted
and said cage abuts said head, means for creating a pres—
sure in said cylinder to cause an advance of said piston
toward said head and ?rst close said port and then com
said plunger and expel the pressed material, a limit switch
actuated by said cage when said plunger is completely 30 press said charge of material in said cage bore and against
surrounded by the same, an electric circuit partly closed
said head, means for causing a short and partial only
by said limit switch hydraulic means actuated by said
retraction of said piston from its advanced pressing posi
circuit when completed to return said plunger and said
tion until it separates from said pressed material, and
cage to their initial positions, and a cam roller switch
positively holding it in that partially retracted position,
actuated concomitantly with the movement of said cage
to complete said circuit when said cage completely sur
rounds said plunger.
2. A cage press having a movable plunger cooperating
means for then moving said cage along said partially re
tracted piston in a direction away from said head until
it fully uncovers said pressed material which is then free
for removal from between said piston and said head, and
means for then causing full retraction of said piston and
return of said cage against said head.
5. The press according to claim 4, and control means
for all of said means for causing their individual opera
tions in the sequence recited.
6. The press according to claim 5 wherein said control
means includes pressure responsive means for stopping
the pressing advance of said piston when a selected pres
with a movable cylinder cage, said cage having an open
ing in the side thereof through which material to be
pressed is admitted when said plunger and cage are in
material-receiving position, electrical switch means ac
tuated when a charge of material has been admitted to
said cage, 21 valve actuated by said switch means to admit
liquid to said press to advance the plunger, a pressure
control valve responsive to the pressure of liquid in the
press, a timer, means actuated by said last mentioned
sure has been reached.
i
valve for interrupting the supply of liquid to said press
and for actuating said timer, means actuated by said
trol means includes pressure responsive means for stoc
timer for effecting a partial return movement of said
plunger and for advancing said cage to extend around
said plunger, a cam roller switch actuated by said plunger
to interrupt flow of liquid into and out of said press to
ping the pressing advance of said piston when a selected
pressure has been reached, and also includes timed means
for maintaining the piston in its stopped position for a
selected interval of time before its said partial retraction.
hold said plunger in partly returned position, to permit a
cake of material to drop out of said press, and electrically
8. The press according to claim 5, wherein said con
trol means includes means activated by the piston for de
operated hydraulic means for returning said plunger and
termining the distance of such partial retraction.
said cage to their initial positions.
3. A cage press of the type such as is employed in
the pressure extraction of liquids from vegetable and
9. The press according to claim 5, wherein the means
for returning the cage to abut said head has a limit cam
ward and from said press head, a tubular extraction cage
open at both ends and telescoped over and sliding end
for returning the cage to abut said head has a limit cam
wise on and supported by said piston, said cage having
piston after the cage has returned to its position abutting
near its end portion nearest said cylinder an upwardly
said head, and also wherein timer means maintains said
piston in its advanced position for a selected period in
which liquid may drain from said pressed material.
7. The press according to claim 5 wherein said con
that activates the means for causing full retraction of said
other materials, which comprises a pressing cylinder and 60 piston after the cage has returned to its position abutting
a press head spaced apart but ?xed relatively to one an
said head.
other, a piston reciprocable in said cylinder endwise to
10. The press according to claim 5, wherein the means
opening lateral port with a hopper leading thereto for
delivering a charge of said material to be pressed for
extraction of a liquid therefrom into said cage in advance
of said piston when said piston is retracted and said cage
abuts said head, means for causing an advance of said
piston in said cylinder towards said press head, ?rst across
said port to close it and then to compress said material in
said cage and against said head until a selected pressure
that activates the means for causing full retraction of said
11. A cage press of the type such as employed in the
pressure extraction of liquid from vegetable and other
materials, which comprises relatively ?xed but spaced
apart hydraulic cylinder and press head, a piston recipro
cable in said cylinder endwise toward and from said head,
an extraction cage having a bore open at both ends and
is reached, means for positively causing a short and partial 75 telescopically ?tting and sliding along the outer end of said
3,070,003
7
piston into and out of abutting contact with said head, with
the head closing the end of said bore that is opposite from
said piston, when the cage abuts said head, said cage hav
ing in its wall near its end toward said piston and in ad
vance of the end of the retracted piston, a port through
which material to be pressed may be introduced into said
bore between said piston and said head, means for deliv
ering ?uid to said cylinder to cause an advance of said pis
ton along the bore of said cage to ?rst close said port and
8
is moved into position for compressing material in said
cage, means for partly and positively moving said plunger
back from its pressing position suf?ciently to release the
cake of compressed material and holding it in that posi
tion, means for then moving said cage in telescopic rela
tion to said plunger to release said cake completely for
discharge from the press when discharged by said plunger,
time controlled means for controlling the movement of
said plunger into pressing position, said ?rst named means
then compress said introduced material against said head, 10 comprising a timer mechanism actuated by a timer for
partly and positively withdrawing said plunger from en
means responsive to such ?uid pressure on said piston for
gagement with the resulting cake suf?ciently to release
stopping said advance when a selected pressure has been
the cake for discharge from the press and positively hold
reached and maintaining that pressure for a selected time
ing the plunger in that partly withdrawn position, a hy
interval during which liquid may drain from said pressed
draulic mechanism which telescopes said cage about said
material, means operable at the expiration of said time
plunger when said plunger is partly withdrawn, and a
interval for causing partial only retraction of said piston
time controlled mechanism for returning said plunger and
until it separates from said pressed material, and positive
cage to their receiving positions.
w
ly holding it there temporarily, means effective after said
14. A cage press having a movable plunger cooperating
partial retraction of said piston for moving said cage
along said piston toward said cylinder until the pressed .
material is uncovered and can move laterally from be
tween the cage and said head, and means for then causing
return of said cage along said piston until it again abuts
said head and for causing retraction of said piston into
said cylinder until it uncovers said port, ready for intro
duction into said bore of a new charge of material to be
pressed.
12. A cage press having a movable plunger cooperat
ing with a movable cylinder cage, said cage having an
opening through which material to be pressed is admitted
when said plunger and cage are in material receiving po
sition and which is closed by said plunger when the same
is moved into position for compressing material in said
cage, means for partly and positively moving said plunger
back from its pressing position sufficiently to release the
cake of compressed material and holding it in that posi
tion, means for then moving said cage in telescopic rela
tion to said plunger to release said cake completely for
discharge from the press when discharged by said plunger,
time controlled means for controlling the movement of 40
said plunger into pressing position, and said ?rst named
means comprising a mechanism actuated by a timer for
partly and positively withdrawing said plunger from en
gagement with the resulting cake to release the cake for
Le CH
discharge from the press.
13. A cage press having a movable plunger cooperat
ing with a movable cylinder cage, said cage having an
opening through which material to be prssed is admitted
when said plunger and cage are in material receiving posi
tion and which is closed by said plunger when the same
with a movable cylinder cage, said cage having an open
ing through which material to be pressed is admitted when
said plunger and cage are in material receiving position and
which is closed by said plunger when the same is moved
into position for compressing material in said cage, means
for partly and positively moving said plunger back from
its pressing position sufficiently to release the cake of com
pressed material and holding it in that position, means
for then moving said cage in telescopic relation to said
plunger to release said cake completely for discharge
from the press when discharged by said plunger, and time
controlled means for controlling the movement of said
plunger into pressing position, and said ?rst named means
comprising a time controlled mechanism for partly and
positively withdrawing said plunger out of engagement
with the cake after completion of the pressing operation
and before the cake is moved into cake-releasing position.
References Cited in the ?le of this patent
UNITED STATES PATENTS
215,606
804,065
Guthrie _____________ __ May 20', 1879
Steven ________________ __ Nov. 7, 1905
1,860,075
Byerlein et al _________ __ May 24, 1932
1,922,513
1,960,548
2,110,972
2,358,765
2,738,550
2,780,918
Wiedmann ____________ __ Aug. 15,
Pfei?er ______________ __ May 29,
Dinzl ________________ __ Mar. 15,
Stadlin ______________ __ Sept. 19,
Groves ______________ __ Mar. 20,
Rohrscheib ___________ __ Feb. 12,
1933
1934
1938
1944
1956‘
1957
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